Polished index loses ground in volatile trading

The overall polishedprices index slipped off its 20-month high in a week of volatile trading.

Daily Index levels

Level

Daily Change

Monday 02/07

121.5

0.4%

Tuesday 03/07

119.8

-1.4%

Wednesday 04/07

119.8

0.0%

Thursday 05/07

119.5

-0.3%

Friday 06/07

119.6

0.1%

Monday 09/07

120.5

0.8%

Weekly Index

The main polishedprices index opened on Monday at 120.5 points, down 0.8% compared with the previous week. The overall index is 2.5% above its level of this time last year, and has gained 3.9% since the start of the year.

Strongest of the benchmark categories last week was the Fine 0.3 carat range, which jumped 4.2% over the previous week.

The Fine 1.0 carat range, however, was the weakest, slipping 2.8% compared to the previous Monday.

Benchmark groupings PolishedPrices Index

Current Levels

2018 Low

2018 High

Index Jan 04=100

Change from week ago

Change from year ago

Index

Date

Index

Date

Year to date change

Overall

120.5

-0.8%

2.5%

115.9

12-Jan

121.5

02-Jul

3.9%

1 crt/4gr

Fine

123.2

-2.8%

10.4%

112.4

16-Feb

126.8

02-Jul

8.5%

Commercial

118.2

0.4%

6.6%

109.5

02-Mar

120.0

03-May

6.3%

Mixed

96.1

-0.8%

-1.8%

94.3

05-Feb

98.1

27-Mar

0.3%

0.5 crts / 50 pts

Fine

103.4

1.7%

3.0%

94.2

09-Jan

105.2

25-Jun

8.1%

Commercial

108.9

2.7%

3.8%

99.6

02-Jan

112.0

17-May

11.0%

Mixed

97.8

-1.3%

-2.6%

96.2

02-Jan

100.5

26-Apr

1.3%

0.3 ctrs/ 30 pts

Fine

114.7

4.2%

5.4%

98.8

09-Feb

115.2

10-May

16.5%

Commercial

119.1

-1.7%

3.1%

110.3

04-Jan

125.4

13-Mar

9.2%

Mixed

125.1

-0.4%

1.2%

122.0

12-Jan

126.4

14-May

2.2%

The definitions of our groupings are:

Fine: Goods better than I colour and VS2 and above

Commercial: K SI3 and above, excluding the Fine category, and

Mixed: The rest down to M I3

The weightings used in the calculation of these indices are chosen to reflect world production. Please contact us if you would like to see details of the weightings used, or would like to see the information grouped differently.